package j42;

import java.util.concurrent.locks.ReentrantLock;

/**
 * @author chengshuai
 * @date 2021/4/16 17:10
 */
public class SyncAndReentrantLockDemo {

    public static void main(String[] args) {
        System.out.println(123);
        synchronized (new Object()) {

        }
        new ReentrantLock();
    }
}
